Tobacco pipe



Nov. 22, 1932. D. P. LAvnETEs 1,888,462

TOBACCO PIPE Filed June 6, 1932 [Yaw/0 1. Z 4105/65 1 Nv'ENToR ATTORNEY Patented Nov. 22, 1932 UNITED STATES PATENT OFFICE navn) r. navmrns, or anooxmm, NEW YORK ronacco PIPE Application filed June 6, 1932. Serial No. 615,519.

My invention relates to improvements in tobacco pipes and is particularly directed to what is termed in the art a unit, one of the functions of which is to provide a separable connection between the bowl stem and the pipe bit.

An object of my invention is to provlde a unit of such construction that while the pipe bit and bowl stem may be readily attached to and detached from each other, nevertheless when the attachment of these parts has been made it cannot be released by a direct pull 7 but only by a torsional or twisting action followed by a pull. I accomplish this object by providing complemental tapered members, preferably both of metal, carried by the bowl stem and bit, respectively, and designed to be engaged and disengaged as desired.

Another object of the invention is to assure a perfect connection between the stem and bit irrespective of any wear to which the tapered members may be subjected, and I a c complish this object by provldlng a certain tolerance between the stem and bit in order that as wear between the tapered members occurs, their relative positions may be altered without reduction of the tight engagement therebetween. I A further object of the invention is to prevent or to reduce to a minimum the deposit and/or accumulation of moisture in any part of the bowl or bowl stem and to greatly facilitate the removal Ois'uchmoisture. I accom plishthis obectby providing in the bit, as distinguishe from the bowl stem, a well or chamber which serves asa moisture drain and from which the moisture and products of combustion maybe easily discharged.

Other objects and advanta es of the invention will appear from the ollowing detail description thereof taken in connection with the accompanying drawing illustrating one form which m improved pipe may take. In such drawing, i ig. 1 is a longitudinal sectional view of a tobacco pipe embodying my invention, and Fig. 2 is a similar view of a fragment of a bit separate from the bowl, and having the unit in the bit.

Referring to the drawing by reference position at the inner end of characters, 10 denotes the bowl, 11 its stem, 12 a short passage providing communica tion between the bowl and stem, and 13 the pipe bit. These parts may be of any usual approved form and material, although by preference the bowl and stem are of wood and the bit of hard rubber.

The unit, which as its name implies is preferably in one piece, comprises an externally tapered, intermediate plug member 14, a forwardly extending tubular portion 15, a rearwardly extending tubular, externally threaded nipple 16 .and an annular flange 17 located between the inner terminus of the thread and the plug 14. When the unit is in position in the stem, the nipple 16 is received in a correspondingly threaded bore 18 in the stem, the rear end of the nipple abutting a shoulder 19 constituted by the wall of an orifice or enlargement 20 of the passage 12, and the flange 17 firmly engaging the forward face of the stem 11. A

smoke passage 22 permits of smoke being a sufliciently firm connection to render the use of cement superfluous.

The bit 13 has the usual smoke passage 23 preferably provided at its inner end with an inset metal tube 24 which projects some distance into an enlarged well or expansion chamber 25 at the rear portion of the bit. The main purpose of the tube 24 is to prevent the passage of solid matter into the bit passage 23. i

At its rear end,the wall of the well 25 is provided with a countersunk opening 26 into which is set and preferably cemented a thimble or ferrule 27 having a tapered bore coinplemental to and designed to cooperate with the tapered plug 14. The taper of the lug 14 and of the thimble 27 is desirably o the same magnitude, initially, although this condition may become changed with the wear of the surfaces.

As intimated above, I provide tolerance between the bit and stem, or more accurately between the complemental tapered surfaces, to assure a tight interengagement of these surfaces despite any wear thereof. One form of suchtolerance is shown in the draw-' ing, from which it will ap ar that the plug 14 and thimble 27 are 0 unequal length the thimble preferabl being the lon er, and a ve 28 is form between the ange 17 an the end or part of the plug 14 havin the test diameter. Were the larger en of e lug 14 to contact the flange 17 an invariabf; etc would be rovided for the movement the thimble and no com sation would be allowed for variation 0 the extent of such movement, in case of wear between the two ta surfaces. By rovidingthe tolerance however, if and w en the parts wear, the thimble 27 is free to ride up on the plug 14 in roportion to the extent of wear and a tight t between the tapered surfaces is alwaysassured. I

Wear if perceptible at all, between the surfaces of the plug 14 and thimble 27 is but slight at the most and, therefore, the groove 28 ma be and in practice is very narrow so that e space 29 which is left between the inner end of the bit and theouter end of the stem, when the pipe is assembled, is so small as to be barely noticeable.

The bowl portion and bit portion being constructed, respectively, as shown in Fig. 1 of thedrawmg and it being assumed that the are interengafied as there shown, if the bit is to be wit drawn for. cleaning of the pipe or for any other purpose, the bowl and, bit are relatively twisted or turned whereby the engagement between the tapered surfaces is eased and the bit may be withdrawn by a slight ull. It is found in practice that, due to t e provision of the tolernice 28, the engagement of the-tapered surfaces is so ti ht that separation thereof by a t p alone is impossible and that initial of the interenga ement by a t motion is indispensab e.

An important feature of my invention is the construction which eliminates the de osit of virtually all moisture in the bowl or owl the deposit, if any, to take stem, and comfils place in the w 25 in the stem. The two outstanding advan of this construction are (1) the absence 0 moisture in the bowl prevents cld fouling thereof and avoids consequent mfort to the smoker, and (2) a great facility in cleaning' the pipe is a 0rd in that any moisture whichhas accumulated in the well 25 may be quickly shaken therefrom when the bit is withdrawn from the stem and the (posed arts of the unit may be easily wi d ry an clean. An added advantage of orming the well in the bit rather than ,in the bowl stem, is that moisture in the well will act somewhat in the nature of a lubricant for the tapered surfaces 14 and 27 and prevent their freezing.

self-adjusti I 3. In a t i acco As is well known in this art, the well acts as an expansion chamber permittin the smoke drawn from the bowl to expand, cool and precipitate the bulk of its contained solids and iquids, so that relatively cool and pure smoke reaches the mouth of the smoker.

Owing to the fact that the jointbetween the bit and stem is constituted by a metal to metal contact the likelihood of in ury or damage to the parts is reduced to a minimum, but should such injury or dama occur, repair or replacement may be e ected easily and economically because except for the thimble 27 the entire joint is a single, simply constructed unit.

I claim:

1. In a tobacco pipe comprising a bowl, bowl stem and bit, a oint between the stem and bit comprising complemental, tapered members with tolerance therebetween.

2. In a tobacco pipe comprising a bowl, bowl stem and bit, a joint between the stem and bit comprising a tapered male member projecting from the stem and a tapered female member in the bit, there being tolerance between said tapered members rendering them pipe com rising a bowl, bowl stem and bit, e com ination with a unit in the stem having an externally tapered plug and a flange spaced from the end of the lug having the ater diameter, of a thimle with a tape bore in the bit designed to self-ad ustin ly engage the said plug.

4. In a to acco pipe comprising a bowl stem and bit, a joint unit carried by the stem com rising an intermediate externally tapered p u a rearward nipple enga the stem, a go at one end of the nipp e spaced from the end of the plu having the greater diameter and a forwar tubular extension, and a thimble with a tapered 'bore mounted in the bit and adapted to cooperate with the plug to form a releasable connection between t e it and stem. 4

5. In a tobacco pipe, the combination with the elements claimed in claim 4, of a thread on the nipple engaging corresponding threads in a bore in the stem.

the elements claimed in claim 4, of a closure at the forward end of said tubular extension, the latter having a hole in its side wall.

7. m a tobacco pipe, the combination with a bowl stem carrying a joint .unit including bowl,

6. In a tobacco pipe, the combination with the combination of a threaded bore, a bit having a smoke passage terminating in an expansion chamber of greater diameter than the said smoke passage, a joint union comprising a threaded nipple engaging said threaded bore, a flange at the outer end of said nipple and designed to seat against the outer end of the stem, an externally tapered plug spaced from said collar by a groove, a tubular extension projecting forwardly from said plug, and a thimble with a tapered bore countersunk in said bit and adapted to engage said plug, the said plug and tubular extension being located in the expansion chamber where the bit and stem are connected to each other.

In testimony whereof I have afiixed my sigpature.

DAVID P. LAVIETES. 

